Electron transport properties of thermoelectrics based on layered substituted transition metal dichalcogenides

A. I. Romanenko, G. E. Yakovleva, V. E. Fedorov, A. Yu Ledneva, V. A. Kuznetsov, A. V. Sotnikov, A. R. Tsygankova, B. M. Kuchumov

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Temperature dependences of the electrical conductivity are studied in the range 4.2’300 K and Seebeck coefficient at room temperature of bulk samples of tungsten dichalcogenide polycrystals with niobium substitutions for tungsten and selenium substitutions for sulfur – W1–xNbx(S1–ySey)2. The two-dimensionalization of electron transport properties is detected at niobium concentrations x ≥ 0.1 in W1–xNbxS2 and x ≥ 0.05 in W1–xNbxSe2. In samples with additional partial selenium substitution for sulfur the electron transport remains three-dimensional. At room temperature the Seebeck coefficient (at equal electrical conductivities) is several times higher in the samples with quasi-two-dimensional transport than in the samples with three-dimensional transport. The calculation of the power factor at room temperature shows its nine times increase.

Original languageEnglish
Pages (from-to)893-900
Number of pages8
JournalJournal of Structural Chemistry
Volume58
Issue number5
DOIs
Publication statusPublished - 1 Sep 2017

Keywords

  • electrical conductivity
  • layered transition metal chalcogenides
  • Seebeck coefficient
  • FIGURE

Fingerprint Dive into the research topics of 'Electron transport properties of thermoelectrics based on layered substituted transition metal dichalcogenides'. Together they form a unique fingerprint.

Cite this